In both iOS 4 and iOS 5, Apple gave the Mail app major overhauls. Even in iOS 6, Mail gained some significant new features. This time around, in iOS 7's version of Mail, the biggest changes are to the look-and-feel, thanks to the systemwide makeover iOS 7 has received. But if you look closely, you’ll find a number of nice improvements behind the face-lift.
In iOS 6, you could rearrange the Inboxes section at the top of the main Mailboxes screen, choosing whatever order you preferred for VIP, Flagged, and the individual account inboxes.
iOS 7 goes a big step beyond that by letting you customize the special views that appear here. Tap Edit when viewing the Mailboxes screen, and not only can you rearrange your current mailboxes, you can hide ones you don’t use, and you can add a number of new special views. Tap each item to enable or disable it, and drag the horizontal-lines icon on the right to rearrange the order of items.